Combined protractor and scale



H. HENRICHS.

COMBINED PROTRACTOR AND SCALE. APPLICATION F|LD1uLY22.1'919.

1,409,342. Y 1 PatentedMa1-- 14,1922.

2 SHEETS-SHEET l'.

H. HENRICHS. COMBINED PROTRACTDR ANI)` SCALE. APPLICATION mibJuLY22,1919.

1 409,342, Y Patented Mar. 14, 1922.

2 SHEETS-SHEET 2.

.will/'ill UNiTEn s'r'r TNT orare HERMAN HENRICHS, OF ST; LOUIS,MISSOURI. n

lGGMIBINED '.PROTRACTOR AND SCAIE.`

To allfwwm lima/,1] fo/noemt: i

-Be it known thatI, HERMAN HnNRIoHs, a citizen of theUnited States,residing at the city of StLouis, inthe State 01E-Missouri, haveinvented'certain new and' useful Improvements: in Combined Protractorsand Scales, of which the following is 'a specification.

This invention may be called a combined protractor and scale, and hasfor its object the provision of a mathematical instrument adapted toassist in the correct alinement of -holcsl for bolts, rivets, and thelike in structural steel or iron work-or the like.

In the accompanying dra-wings forming part o this specification, inwhich like num# bers of reference dcnotelike parts wherever they occur,Y Y

Figure 1 is a' top plan view or' this instru-e ment; v

Al3`igure 2 isa side elevation showing the beams, uprights, struts, andplates used metal frame-works for buildings;

Figure 3 is aefront elevationv of this instrument, looking at it in theway indicated' by the arrows in the line in .Figure 1; and

Figure 4 is a sectional viewtaken on the line 21e-4.- in ligure v1,looking in the direction of the arrows. L Y

Heretofore, ithas been a diflicult, tedious,

and time-taking job correctly to lay out in alinement the bolt or rivetholes for the various parts in the metal framework of buildingsand thelike, and this work'has necessi` tate'd the laying out of such work infull size on a shop floor orsimilarfplace. This. hasV required largespace and tiresome crawling and stooping. With the present instrument,given the height of the upright or the distance of one beamor-cross-piece from another, the scale-bar 1 can be so:moved-=uponf theperpendicular bar 2` as tol give the same effect of distance als in theactual construction, and by moving the protractor-armsl 3 and l to anappropriate place upon the Y scale-bar 1, the same relative angle Jforthe dimensions given will be assumedv by the protractor or scale arms 3andai, relative tok the scale-bar 1 and relative to the degrees scale 5,as will be occupied by the struts 6 and 7 inthe actual constructionshown Figure 2.

By means of the degree scale 5, the exact degree of angle of the arms 3and ltto the base-scale arms 8 and bar l (or to the perpendicular arm 2)will be determined; and

inV

VSpeeication of Letters Patent. Patnted 14, 1922.

Application filed July- 22, 1919. Serial'No. 312,519.

that' angle once ascertained is'fthe same for` i vvthe holes for boltsVQand bolts 10 and is Ylikewise the same forholes-for bolts 11, 12,13,14, andrl. The angle having been thus de-` termined,fit isnecessaryonlyto mark the Vmetal parts, without actually assembling thesame, and, when elevated tothe position where they are to be assembledin a building framework or the like, it will be found that, the angleofthe holes having been thus i mathematically ascertained, the holes arein alinemcnt and readyv for use.

l 'The perpendicular bar` 2 is preferably Y iixcd' tothe center plate 16carrying the degree scale 5. Thebase-scalearms 8 are pret`- erablypivoted to the screw 17. The arms 3` andtf are pivoted on'the saidscrewl 17, and

8' rigid and lengthwise, to holdA the armsl 3 and41igid when desired,the lower end of .each 'of fthe said thumb-nuts 194 being equipped withVal notchedvnut v20, the 'lip 21 of which underlies and ridesvupon'theunderneath edge or the periphery of the degree scale Ordinarily,[the base-scale armsS will be lined rigidly 'whena job is begun, and'will remain asabase linefwh-ilethearms 3 and t are free upon their pivotv17'. Y

. VThe ba-rf 2" is composed of a relatively flat sro Arm 1 ris freelyslidable Aupon the Aperscale-part 23 and a'tra'ck 24 adapted to slideinthe groove 25 in the gripfmember 26, to

which bar'l isattached Yby screws 27,: which grip-member is alsopierced'by thumb-screwV 22. for holdingthe'bar 1v stationary upon bar 2'when desired. f

4It willbe observedl that the entireiinstru-V.

meintcan be knocked down. so. as to: be' comprised'within very smallspace o'ra'smallr case or package. by removing-bar'lfr'om bar v 2i'andswinging arms 8 and arms '3 and t parallel with bar 2 and' laying theseparated Y armi: 1 alongin the same direction.

' Having vthus Y described this invention, hereby reserve the benefit ofalli-'changes'in" form, arrangement, order, ory use of parts as it isevident that many' minor changes may be made therein without departingfrom thespirit of this invention orl the scope of the following claims.

The terms perpendicular transverse,

pivoted, and base-scale as usedhcreiu are predicated on the assumptionthat the two base-scale armsy S are vin the position shown in Figure land that the bar 2 extends at a right-angle thereto, as shown in Figurel. rihus the scale-bar l extends transversely tothe bar 2 and the bar 2is perpendiculm' thereto as Well as to the basescale arms 8. rfhe arms 8and the arms 3 and i are pivoted on screwlT relative to the position ofthe said members shown in Figure l. The relation of the bar 2 is fixedrelative to the center-plate 1G, which carries the degree scale Thusarelatively stationary frame is provided by combination of the bar 2 andthe center-plate i6. its the scale-bar l is fixed to bar 2 againstpivotal or lateral movement and is Vmade longitudinally slidablethereon, the bar 2 occupies permanently the relation oi perpendicularityto the scale-bar l. rhis enables the position of the arms 8 to bedetermined accurately as being either parallel to bar l andsimultaneously perpendicular to bar 2 or as being at a different angle.-Fio'ure l shows the instrument as laid out beiore the user ready foruse, and in that sensethe arms 8 Will be regarded substantially as itsbase. The pivotl and the mode ot' attachment thereto of arms 8 and arms3 and 4 allovv movement of any one of the said tourarms inIapivotedmanner ori/screw 17 lto any angle relative to the vitixed members l and2 and the degree-scale 16. v

lclaim: y y l l. In an instrument ot" the character described,the-combination ot'a member having a scale thereonffa second scalemember adapted to be moved relative to the said first mentionedscale-member, a pivoted scalearm adapted to co-operate with the saidsecond scale Ymember to determine dimensions, a degree scale iixedrelative to the said first'- mentionedscale member and a pair of armspivoted 'with krelationto the said first-mentioned scale member.y l

v2. In an instrument ot the character described, the combination of aimember khaving a scale thereon, a Vsecond scale-member adapted to bemoved relative to the said Yti'st-mentioned scale-member, a pivotedscale-arm adapted to co-operate With the said1 second Yscale-member :todetermine `dimansions a degree scale fixed rela tive tothe saidtiret-mentioned scale member a4 pair of arms pivot-ed with relation tothe said-firstmentionedA scale member, and a base-scale arm attached toone or more of the aforesaid members.

3. In an instrument of the character described, the combination ot amember having a scale thereon, a second scale-meniber adapted to bemoved relative to the vsaid first-mentioned scale-member, a piratedscale-arm adapted to co-operate with the said second scale-membertoVdetermine diinensions,y a degree scaleixed relative'to the saidfirst-mentioned scale-member, a pair ot arms, and a-base scale arm alsopivoted with relation to said first-mentioned scale member, said degreescale being adapted to determine the angle of said pair of arms.

4. In an instrument of the character described, the combination o'c' amember having a scale thereon, a second scale-member adapted to be movedArelative to the said first-mentioned scale-member, a pivoted fscale-armadapted to co-operate With the said second scale-member to determinedimensions, a degree scale iixed relative to the said first-mentionedscale member, a pair of arms, and a pair of base scale arms also pivotedwith relation to said first-mentioned scale member, said degree scalebeing adapted to determine the angle oi said pair of arms.

In an instrument oi the character dcyscribed, the combination ot amember having a scale thereon, second scale-member adapt-ed to be movedrelative. to the vsaid first-mentioned scale-member, al pivoted berextending transversely across the irstnamed member and having a groovein its intermediate portion slida-bly cooperable n with said ytrackwhereby to permit adjustment of such transverse scale member along thetiret-named scale member, means for temporarily securing the-transversemember relative to the other scale member, a scale arm pivoted to theplate and movable freely 'with relation to the transverse scale member,and a degree scale carried by the plate and eooperable with the pivotedscale member. .l f i y ln testimony whereof I .hereunto aiiix mysignature. I

HERMAN nnnnicns.

